One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,5)(3,8,7,4)(9,10,13,16)(11,14,15,12)(17,18)(19,22)(20,27)(21,23)(24,28)(25,31)(26,29)(30,32)(1,3,6,7)(2,4,5,8)(9,11,13,15)(10,14,16,12)(17,19,21,26)(18,22,23,29)(20,25,28,32)(24,30,27,31)(9,12)(10,15)(11,16)(13,14)(18,23)(22,29)(24,27)(30,31) involution — undirected(1,4)(2,7)(3,5)(6,8)(9,11,13,15)(10,14,16,12)(17,18)(19,22)(20,24)(21,23)(25,30)(26,29)(27,28)(31,32)(1,4)(2,3)(5,7)(6,8)(9,12)(10,11)(13,14)(15,16)(17,19)(18,22)(20,25)(21,26)(23,29)(24,30)(27,31)(28,32) involution — undirected(1,5,6,2)(3,8,7,4)(9,10)(11,14)(12,15)(13,16)(17,20)(18,24)(19,25)(21,28)(22,30)(23,27)(26,32)(29,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.